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Maps for Garmin based on OpenStreetMap

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Frequently Asked Questions

  1. Is it possible to install several maps on the GPS at the same time?
  2. Are the maps compatible with my Garmin model?
  3. Can the maps be used in a GPS of another brand?
  4. What is the map scale?
  5. I have searched for something placed in an area I will travel soon, but device didn't find anything. Will it work when I'm there?
  6. What is the difference between map types (OSM base map, topographic, trucks and map with DEM)?
  7. When I try to open the file I downloaded, Windows says image file is corrupted or it is not an image file.
  1. Is it possible to install several maps on the GPS at the same time?

    Yes, it is possible. How to do it depends on your GPS model. There are models which are able to read the maps only if the file containing them is called gmapsupp.img and models which can read the maps with other names. For the latter you just have to change the name to whatever you want, keeping *.img extension. For example. country1.img, country2.img, etc. The way to know if your device reads maps with a name other than gmapsupp.img is simple, just try changing the name and see if it recognizes it or not.

    For those which only admit maps called gmapsupp.img you have to do the following: download and install MapSource/BaseCamp version of the map you are interested in. Once done, from within MapSource or BaseCamp (using MapInstall utility) select the maps you want to have in your device and send them to you GPS in a single step. This way a unique gmapsupp.img file will be created with all selected countries. Note that maps installed this way are not connected to each other, so you'll not be able to calculate routes from one country to a contiguous one.

  2. Are the maps compatible with my Garmin model?

    Up to date, maps are compatible with all Garmin GPS models.

  3. Can the maps be used in a GPS of another brand?

    No. Each manufacturer uses it's own map format and they are not compatible with each other.

  4. >What is the map scale?

    Unlike paper maps, these maps don't have a fixed scale. You can zoom in and out on your computer or on the GPS, so that scale varies. Current scale is usually displayed at some corner of your screen.

  5. I have searched for something placed in an area I will travel soon, but device didn't find anything. Will it work when I'm there?

    If you search for something too far away (hundreds of km) from where device located satellites last time, it is normal it doesn't find anything. You have to simulate you are in a place nearer the place you are making your search. The way to do it varies among models. On some models, if you center map screen on the place you are interested in and then make a long touch on your device screen, an option to fix position in that place pops up. On other models it may be a Menu button option.

  6. What is the difference between map types (OSM base map, topographic, trucks and map with DEM)?

    If you place mouse over map type name at downloads page you'll see a short description of each type. They are described in more detail below:

    • OSM Base Map: Map for general use. It contains roads, streets, tracks, paths and POI among other elements. Most appropriate for nüvi series satnavs.
    • Topographic map: It contains the same information than base map plus contour lines, which will give you information about terrain height and steepness. Suitable for outdoor activities, such as hicking, mountaineering, etc. Contour lines can be activated or deactivated as needed.
    • Map for Trucks: Map specially designed to be used in trucks, as it considers weight, height, etc. restrictions affecting these vehicles when calculating routes. Elements without importance for these vehicles have been removed from the map, to make it clearer. +Info
    • Base map with DEM: Map is rendered over a Digital Elevation Model, which enables showing hill shading, calculate route profiles and show 3D maps. +Info

  7. When I try to open the file I downloaded, Windows says image file is corrupted or it is not an image file.

    It's a Windows problem. The file containing the map has .img extension and Windows thinks it is an image file, but it is not the case. It is a Garmin img format file. This file is not to be opened as other files in your computer, but to be copied to your GPS.

You can leave your comments on this page below:

Comments (16)

Topic: Questions
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Jungkurth (Dornstetten, Germany)
New problem with Central Europe map! How can I add a screenshot? There is a bug in the map: many regions are shown as "water", but they are land under commercial/industrial use. Mad
So there are blue polygons, where they shouldn't be. And it is not a problem of the TYPfile (I tryed to change!), it is a problem of the map itself!
Admin:
You are right. I rely on an external source for oceans boundaries, and from time to time they are wrong and "flood" everything. Next update of the map will be right. If server has free time this evening I'll update the map
14th August 2020 8:41pm
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Jungkurth (Dornstetten, Germany)
I just downloaded and opened the Central Europe map. But it doesn't work! An older version some months ago was good, but the newer ones (06/07/20 and 13/07/20) don't work correct: they show only a small region along the outer borderline, an all the inner part is empty!
Admin:
You are absolutely right, thanks for reporting. I will update Central Europe map later this evening and fix the issue.
18th July 2020 6:34pm
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Daniel Marcelo Villani (Campana, Argentina)
have an old model of garmin nuvi 205, I wanted to know how I do not have the cable to connect the gps to the computer, I wanted to know if you can go from the pc to a removable memory and put it in the gps. In that case how to do if I have gmapsupp file. Thank you
Admin:
As far as I know, 205 uses a standard micro USB cable, so you can get one easily. Anyway, you can use an SD card to copy gmapsupp.img file in it and then insert it in your device. Please have a look at "Using maps" section for more info.
6th July 2020 6:18pm
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Jungkurth (Dornstetten, Germany)
Hi,
how can I change the view (colors, line thickness a.s.o.) of the map on my Montana device? It is nearly impossible to recognize some of the minor roads (especially the thin yellow lines in green environment!)!
Thanks, Christoph
Admin:
You need to edit TYP file, which determines all elements view properties. You'll need TypWizard of similar software for that.
Can you send me some screenshots of the roads you can't see properly? I can try to improve visualization.
15th June 2020 10:23am
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